Dr. Stephen R. Keller started locally at Alta Loma Elementary, Alta Loma Junior High, and Alta Loma High. Completed four years undergraduate work at University of California Riverside, graduating in 1989 with a Bachelor of Science degree in Biology, with honors. Dr. Keller completed Optometry school at University of California Berkeley in 1993, obtaining a Bachelor of Science degree in Physiological Optics and a Doctorate of Optometry degree, with honors, and soon thereafter joined the Milauskas Eye Institute in Palm Desert. In 2001 Dr. Jerry Rosenstein, his mentor, retired and Dr. Keller acquired the Alta Loma Optometric Center in the Inland Empire and in unison opened Cornerstone Optometry in Palm Desert. His foremost objective is to develop the practices into thriving primary eye care centers offering comprehensive visual examinations and a full range of vision care services. Dr. Keller completes more than 25 hours of continuing education every year at the Loma Linda University Department of Ophthalmology. .